<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Grid template rows example</title>

    <link rel="stylesheet" href="css/style.css">
</head>
<body>
    <div class="container1">
        <div class="item">1</div>
        <div class="item">2</div>
        <div class="item">3</div>
    </div>  
    <div class="container2">
        <div class="item">1</div>
        <div class="item">2</div>
        <div class="item">3</div>
    </div>  
    
    <div class="container3">
        <div class="item">1</div>
        <div class="item">2</div>
        <div class="item">3</div>
    </div> 
    <div class="container4">
        <div class="item">1</div>
        <div class="item">2</div>
        <div class="item">3</div>
    </div>
    <div class="container5">
        <div class="item">1</div>
        <div class="item">2</div>
        <div class="item">3</div>
        <div class="item">4</div>
        <div class="item">5</div>
        <div class="item">6</div>
        <div class="item">7</div>
        <div class="item">8</div>
        <div class="item">9</div>
        <div class="item">10</div>
        <div class="item">11</div>
        <div class="item">12</div>
    </div> 
</body>
</html>